Measuring rule with opposed sliding contacts



Oct. 14, 1952 D. D. BROOKS MEASURING RULE WITH OPPOSED SLIDING CONTACTS Filed July 25, 1947 2 SHEETSSHEET 1 Inventor David D. Brooks Oct. 14, 1952 BROOKS 2,613,444

' MEASURING RULE WITH OPPOSED SLIDING CONTACTS Filed July 23, 1947 2 SHEETS-SHEET 2 Inventor David 0. Brooks By WWW; 3M5

Patentedoct. 14, 1952 UNITED STATES PATENT OFFICE "masnnmonnmwirn orros'nn SLIDING CONTACTS David-D; Brooks, Union m. 01110 Application July-'23, 1947,, Serial No. 763,136

The present invention v iul improvements in measuring 'ln'strunientsand more particularly to a rule embodying means for reading small Iractionswith greater accuracy.

An important object or the present invention is to provide a device or this character which may be conveniently used for periorming the functions of a rule as well as calipers for obtaining direct reading of matrix-actions on "a dial and in which the graduation! on the dial are displayed in such a siaeas' to easily determihethe reading without eyetrum and to reduce the margin of error in" the-use or an instrument or this character. a Y

A further object of the invention is to provide a device of this character of simple and practical construction, which isemcient and reliable in operation, relatively'lnexpensive to manufacture, and otherwise well adapted for the purposes ior which the same is intended. 1

Other objects-and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, reference being had to'the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in'which:

Figure l is a 'top plsn'vlew illustrating one embodiment of the invention;

Figure 2 is a side levational view'thereof;

Figure 3 isa transverse sectional view taken on a line 3-3 of Figure 1;

Figure 4 is a similar view taken on a line 4-4 ofFigure1;' h V I I Figure 5 is a fragmentary top plan view with the dial removed and with parts shown in section; v

Figure 6 is a transverse sectional view taken on a line -B--6 orFigure 1;

Figure 7 is "a fragmentary longitudinal sectional view taken on a line l- -T or Figured I Figure 8 is a top plan view illustrating a modilied construction;

Figure 9 is a side elevatio view thereof; and

Figure 10 is a transverse sectional view taken on a line IL-I0 of Figure 8.

Referring now to the drawings in detail and first with respect to the form of invention illustrated in Figures 16 inclusive, the numeral 5 designates the elongated rule body having a longitudinally extending dove-tail shaped rib i on its upper suria-ce and adjacent one edge of the body. The upper surface of therlb 6 is formed with transverse"='grooves 1 spaced equi'd'istantly from each other at one inch intervals and in which a spring-actuated ivoted dog 8 carried by relates to new and use- 7 "3 Claims. (01. as-441) a slide 8 is engaged to hold the slide in a set position on the body 5. v; The slide 9 con'forinahly "fits on the rib 6 and is termed with an opening I! through which the dogjti works to provide access to the grooves 1. Qne'edge o'fthe slide is formed with a pointer H which is bent downwardly over the edge of the liody'adjacent the rib B and the other end of the slide is disposed, flatly on the body 5 and is slidgglie in a channel ll at-the opposite edge of the y; v A 'I h e surface of the body 5 adjacent the channel I3 is provided with giaduatiohs l4 denoting inches and the end portion I2 of the slide is providedwith a sight opening IS in whichone of the 'gradua'tions appears when the dog I is engaged in' one oi the groove-s "I. The graduations I! read from zero from a point ihwardlyifrom one end portion 16 of th'e body upwardly toward an opposite end of the body in. accordancewith the length of the body.

The rib 6 extends along the end portion iii of the bodyon which is slidably mounted a second slide I! also provided'at one edge with a pointer t8 cooperating with the pointer l I by a move'- ment of the pointers toward'and away from each other when moved longitudinally of the body.

The opposite edge ofthe slide I1 is. formed with an internally threaded sleeve 18 in which. a feed screw 20 is threadedly engaged, the screw being positioned longitudinally of the body. 5 with its inner endijournaled in a bearing 2! formed "with-an annular chamber 22 in which a flange 23 carried on the end of the screw is rotatable and held against endwise movement. I The outer "end of the screw is smooth and journaled in a hearing, the smooth end of the screw projecting outwardly from the adjacent end or the -body and formed with aknurled-knob 25.- l f The end portion 18 of 'the body at its edge opposite from the rib 6 is formed with a laterally enlarged plate 2 6 having a vertical shaft 21 journaled therein and on which is secureda gear or pinion 28 operativ'elyeng'aged with the-screw 20. A clrcl'ilar dial plate I! is secured to the upper end of the shaft 21 having gradu-ations 30 1 provided on its upper surface and at the periphmeasured between the pointers H and I8 and where the measurement involves one or more inches and a fraction thereof the slide 9 is moved toward the left on the rule body to a position on the scale I 4 corresponding to the complete inches of the measurement and the slide 11 is moved toward the right away from the slide 9 by the manipulation of the screw 29 until the desired'fraction of arfinch cr me-graduation 30 registers with the pointer 32 whereupon the pointers II and 18 will be spaced ap a b fi '1 2. A measuring device comprising a fiat elongated rule bodyhaving a longitudinal rib on its corresponding to the desired ..measurement.

A stop 33 carried by the'end portion [6 of t rule body is positioned in the path of movement of the slide I! to limit the outward movement of the slide.

By constructing the dial platei'ofa 'circ u ni *named sl'id'e, and" indicating means for the second named slide.

upper surface and a longitudinal channeled ference greater than the gear 218, the gra'du'ati'ons.

8"- 1O inclusive,-the ruleybodyl-is-shpwn at 3!! with the inch slide shown at" 35 and the fraction of an inch :slideshown at 36 both-. slidable on the rib 3-1 asheretofore described-e -A" feed screw 31 is'threaded throughaninternally, threadedsleeve' 38 fixedto theend portion is connected to the slide 36 by a ball and socket construction Illito. slidably actuate, the slide- 36 --by-the, manipulationyof the screws A dial ;plate- 4! projects-from theflrear edge '39 of the body and the innerr'endof the 'screw portion of :the'end 39 ofthebody 'and-onwhich 1 inner'and' outer-circularly arranged graduations l2 and: are provided, -,thei outer graduations reading in;;fractions: of ,an:,;inch fromazeroto one-half and. the inner gra'duations'readingin fractions of an-inchfrom one-halfto-oneinch.

A pointer 44 is pivoted intermediateitsends on-.a pin Iii-rising from the plate .4] :for the movement of its outer end across :thegraduations 42 and-43. A'pin 46--r-ises from;.the:slide:35 inithe longitudinal slot-:41 in therear end of the pointer toactuate thepoi-nterina back and forth.mov.e mentby the'slidinga'ction'of the slidefiili: "-i' The" movement. of the slide 361actuates" .the pointer 44 to register the movementof the slide infractions-of an inchon the'graduationsfliand :43 and the outer-end ofth'e pointer is constructed 'ofaan increased length wherebyc'its' movement is greater than that or the'rslide tothus enableia more accurate reading of the-fractions of an inch measured by =themoveme'nt-of-theslide'35d I In .viewof the foregoing description taken in conjunction with the accompanying drawings, it is -believed that aclearmnderstanding of the device will be quiterapparent to'those ,skilledin this'art. .--A more detailed description is'accord- -inglydeemed unnecessary:

It-.-is to beunderstood, however, thateven though there is herein shown-,andedescribed .a

preferred embodiment of; the invention the, same is susceptible tocertainchanges;fully-,compre- ,hended bytthespiritof gthe invention as herein described and the scope of the appended claims. Having, described-'ithe" invention, what is claimedas new-is:

- 1'.-A measuringpdevice comprising afiatelongated rule ,body having a longitudinal rib on its parallel to the rib, said body having'a scaleonits of slides mounted on the rib, a lateral extensio .upper surface betweenlthe rib and-guide, a pair guide at one edge also on its upper surface and 15" uppe surface, between the rib and guide, a pair parallel to the rib, said body having a scale on its of sue-es mountedon the rib, a lateral extension on onedr the slides having a sight opening selectively registering with the indicia of the scale and also havingdts outer-edge traveling in the channeledguide to hold the extension flat on the scale,-loc king meansearried by said one slide holding --the latter in adjusted position on the rib, ;a fe ed screwconnected to the other of said slides for adjusting -the latter relative to the firstlnamed-slide; a dial on the body, a swingable pointer pivoted; onthe dial, and means con necting the pointer-- to said second named slide for actuation by the latter. 7 v

= I3. A1 measuring device comprisinga fiat elongatederulebody having a longitudinal rib on its upper surface and a longitudinal channeled guide at one edge also on its upper surface and parallel totherib said body having a scale on its upper surfaee between the riband guide, a'pair of slides mounted on the rib,-a lateral extension on one of the slides having asightopening selectively registering, with ---the indicia of the scale and also having its outeredge-traveling in the channeled guidev to-hold the extension flat on the scale, .-locking means carried by 'said' one slide -h01ding .thelatter in adjusted position on the rib, afeed screw connected to the other of said slides for adjusting the; latter relative to. the first named slide,;a rotatable dial mounted onthe body, means"operativelyrconnecting the dial to the feed screw, andastationary pointer on the body coacting with-the-diaL I yn) ,D. BROOKS,

REF KENQ S. C T

The followingireferences are of record in the file of this patent:

: UNITED: STATES PATENTS N m er .7 ame. Date 51,335 1 Dec. 5, 1865 5 l,flq7 i, jj Dec."26, 1865 404,305 Richards May 28, 1889 61,1 9,1 1. Bran 1 754,9 7 r em Ju1y"12,1904 851,507 Fetherolf Apr. 23, 1907 111504129 V ai1 Jan. '7, 1913 1,965,744 Sutorik June 24, 1913 "1,334,217 "Blomberg Mar. 16, 1920 1,576,797 {"'S chustarich Mar. 16, 1926 1,602,490 Homan Oct. 12, 1926 1,829,323 1 Witteret 'al. 1 Oct. 27, 1931 1,911,449, Ea'rl May 30, 1933 f y EQRE GNQPATENTS I ,Numben- 3, Country Date 1 86,284 J ;,;France, June 26, 1869 200,787 Germany July 30, 1908 

